Quartz Crystal Resonators
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Quartz crystal resonators are probably the most widely used circuit timing element with a frequency range from a few kHz to over 200MHz.
Quartz crystal resonators offer very high Q values coupled with good frequency versus temperature characteristics making them the first choice where accurate clocks or reference frequencies are needed.
Magna Frequency Components offers possibly the widest selection of quartz crystal resonators available from a single source, from the world’s smallest AT cut SMD crystal at only 2.0x1.6x0.45mm high, ideal for use in modern mobile devices such as Bluetooth, DAB radio and ZigBee, to low cost HC49/U crystals for high volume consumer applications.
Leaded Quartz Crystals
| Image | Type | Range | Size | Features | New* | |
|---|---|---|---|---|---|---|
 |
HC49/U | 1.8 ~ 150MHz | 11.05x4.65x13.46mm | Low cost. Max pulling range | Yes | |
 |
HC49/T | 1.8 ~ 180MHz | 11.05x4.65x9.3mm | Low profile version of HC49/U | Yes | |
 |
HC49/4 | 3.2 ~ 100MHz | 11.05x4.65x3.5mm high | Low Profile. Lowest cost | Yes | |
 |
HC49/3 | 1.3 ~ 110MHz | 11.05x4.65x2.5mm high | Low profile version of HC49/4 | Yes | |
 |
UM-1 | 6 ~ 200MHz | 7.9x3.2x8.1mm high | Miniature size. Tight tolerance available | Yes | |
 |
UM-4 | 6 ~ 200MHz | 7.9x3.2x4.7mm high | 4.7mm high version of UM-1 | Yes | |
 |
UM-5 | 8 ~ 200MHz | 7.9x3.2x6.0mm high | 6.0mm high version of UM-1 | Yes |
SMD Crystals
| Image | Type | Range | Size | Features | New* | |
|---|---|---|---|---|---|---|
 |
HC494SM | 3.2 ~ 100MHz | 11.4x4.65x4.2mm high | Lowest cost. Industry standard | Yes | |
 |
HC493SM | 3.2 ~ 100MHz | 11.4x4.65x3.2mm high | Low profile version of HC494SM | Yes | |
 |
SM75A | 6 ~ 110MHz | 7x5x1.5mm high | 4-pad seam welded. Wide frequency range. | No | |
 |
SM53A | 8 ~ 110MHz | 5x3.2x1.0mm high | 4-pad seam welded. Tight tolerance. | Yes | |
|
SM53B | 8 ~ 110MHz | 5x3.2x1.0mm high | 2-pad all ceramic package. | Yes | |
 |
SM42A | 12 ~ 48MHz | 4x2.5x0.8mm high | 4-pad seam welded. Tight tolerance. | No | |
 |
SM32A | 16 ~ 40MHz | 3.2x2.5x0.7mm high | 4-pad seam welded. | Yes | |
 |
SM22A | 16 ~ 50MHz | 2.5x2x0.55mm high | 4-pad seam welded | Yes | |
 |
SM21A | 24 ~ 50MHz | 2.0x1.6x0.55mm high | 4-pad seam welded. Smallest size | Yes |
Low Frequency Crystals
| Image | Type | Range | Size | Features | New* | |
|---|---|---|---|---|---|---|
 |
W38 | 32.768kHz | 3x8mm Cylinder Leaded | Very low cost. 20 ~ 200kHz available | Yes | |
 |
W26 | 32.768kHz | 2x6mm Cylinder Leaded | Small size. 20 ~ 200kHz available | Yes | |
 |
SM26A | 32.768kHz | 6x2mm SMD Cylinder | 20 ~ 200kHz available | Yes | |
 |
SM26D | 32.768kHz | 6x2mm SMD Cylinder | Flat surface. 20kHz ~ 200kHz available | Yes | |
 |
SM94 | 32.768kHz | 9x4mm | Low cost plastic SMD. Available 30kHz ~ 200kHz | Yes | |
 |
SM715 | 32.768kHz | 7x1.5mm | SMD plastic package. 1.5mm high | Yes | |
 |
SM415 | 32.768kHz | 4x1.5mm | SMD metal lid | No | |
 |
SM315 | 32.768kHz | 3x1.5mm | SMD. Smallest available | Yes |
New* = Recommended for new design